Clams normally just want good lights. Small clams you will have to feed phytoplankton. I googled it and and i found nothing about gobys nipping clams. I might have the only one who does. Clams are easy to keep if you can keep lps alive then you will be just fine with clams

Behind a successful reefer stands a wife with a towel-Behind a unsuccessful reefer stands a wife with a divorce letter